<span>
  <span>INNERSLOT</span>
</span>

<span>
  <xxx>inner-argument</xxx>
</span>

<div>
<span>
  <xxx>
    OUTERSLOT
  </xxx>
</span>
</div>

<div>
<span>
  <div>outer-argument</div>
</span>
</div>

<div>
<span>
  <xxx>
    OUTERSLOT
  </xxx>
</span>
</div>
